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A157047 as a simple table

na(n)
02
11
21
31
4-1
52
61
73
8-7
96
101
11-12
1240
13-46
1424
151
1660
17-260
18430
19-326
20120
211
22-360
231920
24-4140
254536
26-2556
27720
281
292520
30-15960
3142420
32-60732
3349644
34-22212
355040
361
37-20160
38147840
39-467040
40825216
41-883008
42574848
43-212976
4440320
451
46181440

[2,1,1,1,-1,2,1,3,-7,6,1,-12,40,-46,24,1,60,-260,
 430,-326,120,1,-360,1920,-4140,4536,-2556,720,1,
 2520,-15960,42420,-60732,49644,-22212,5040,1,
 -20160,147840,-467040,825216,-883008,574848,
 -212976,40320,1,181440]